sometimes after closing a Document i have an empty space with ~"no doc selected" (german "Kein Dokument ausgewählt") with no possibility to access the file-manager. i have to use another App to open something in Files. Then everything seems okay again.
I also had no success unzipping big zip-archives like those
iFiles for example is able to do that by using libzip (see help>legal). it would be great if Files could handle bigger Archives